Automatic gate for elevators.



PATENTED JULY 11, 1905.

J: H. MORRIS. AUTOMATIC GATE FOR ELEVATORS.

APPLICATION FILED AUG. 17,1903.

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PATENTED JULY 11, 1905.

T AUTOMATIC GATE FDR ELEVATORS.

APPLICATION FILED AUG. 17,1963.

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Patented July 11, 1905.

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JAMES-H. MORRIS, OF KANSAS CITY, KANSAS.

AUTOMATIC GATE FOR ELEVATORS-' SPECIFICATION forming part of Letters Patent No. 794,306, dated July 11, 1905.

Application filed August 1'7, 1903. Serial No. 169,841.

To (U 1072/0111, it may concern:

Be it known that I, JAMES H. MoRRIs, a citizen of the United States, residing at Kansas City, in the county of Wyandotte and State of Kansas, have invented new and useful Improvements in Automatic Gates for Elevators, of which the following is a specification.

My invention relates to automatic elevatorgates; and the object of my invention is to provide elevator-gates at each floor of a building which will be automatically opened by the passage of the elevator and which will fall to closed position by their own weight after the elevator-car has passed above or below them.

ith this object in view my invention consists in the novel construction, combination, and arrangement of parts, as hereinafter described, and shown in the accompanying drawings, in which Figure 1 is an elevation of an elevator-shaft of a three-story building, the gates of the upper two floors being closed and that of the lower floor being raised as the elevator-car is at the bottom of the shaft. Fig. 2 is a sectional elevation showing the same parts in the same positions. Fig. 3 is a sectional detail view showing the device carried by the elevatorcar for opening the gate of any floor between the top and bottom floors when the car is ascending, showing also the device operated by the traveling device. Fig. 4 is a sectional detail view showing the device carried by the elevator-car for opening the gate of any floor between the top and bottom floors when the car is descending, showing also the device operated by this traveling device. Figs. 5 and 6 are detail views of the device by which the top-floor gate is raised. Fig. 7 is a detail view of the device by which the bottom-floor gate is raised. Fig. 8 is a plan view of both of said devices, showing the grooves in which they travel in horizontal section.

1 represents the corner-posts of the elevatorshaft.

2 is the elevator-car.

(0 indicates the level of the bottom floor, I) that of the second or middle floor, and c that of the topmost floor. 4, 5, and 6 are the gates provided for closing the shaft at these floors,

respectively. These gates are mounted to slide vertically between the usual tongued or grooved uprights 7. The lower gate 4 has connected thereto a cord 8, which passes up over a pulley 9, around a horizontal pulley 10, over a guide-pulley 12, and finally over a pulley 13 and down to a block 14:, which-is suspended thereby. The weight of the gate exceeds that of this block, so that normally the gate is down. The second-floor gate 5 has connected thereto a cord 15, which passes around three pulleys 16, 17, and 18, similar in arrangement to those of the lower gate, thence down to reversing-pulley 19 and up to a block 20, to which it is connected. Connected to the upper end of this block is a cord 21, which passes up over a pulley 22 and down to a heavy or weighted block 23. Blocks and 23 are preferably fittted in T-grooves, as shown in Fig. 8, cut in upright guides 24. The top-floor gate 6 has connected thereto a cord 25, which passes around three pulleys 26, 27, and 28, down to a reversing-pulley 29, and up to a block 30, to which it is connected. Secured to the block 20 is a pivot-bearing 32, on which is pivoted a bell-crank lever 33 34:. An open spring 35 is interposed between the upper arm 33 and the block 20 andholds the lever normally in the position shown in Fig. 3.

Referring first to Fig. 2, an upright board 36 is secured to the side of the elevator-car adjacent the runways of the blocks 20 and 23. This board serves to support the devices by which the motion of the elevator is primarily transmitted to open the middle gate or gates. The device which actuates the block 20 consists of a substantially vertical lever 37, fulcrumed at 38. The upper end of this lever is bent outwardly at 39 and projects through an opening 40, so as to engage arm 34: of lever 33 34. When the car is ascending, the point 39 pushes up the arm 34, and with it the block 20. The spring 35 is made strong enough that it will not yield until the block has been lifted to the end of its travel. It strikes a stop, (not shown,) the spring 35 yields, and the point 39 passes on above the arm 34, which is then restored to normal by the spring. The upward movement of the block 20,-. trans- 7 while the car was at the second floor.

mitted through the cord 15, raised the gate 5 The gate descends by gravity. To provide for lifting this gate when the car is descending, the other block 23 is provided with a bellcrank lever 41 42, arranged in inverted position with respect to lever 33 34, and the former is provided with a push-spring 43. The device for engaging the arm 41 consists of a lever 44, fulcrumed at 45 on the board 36 and provided with a push-spring 46. In Fig. 4 this spring is shown compressed; but normally it holds the lever in such a position that the bent portion 47 projects outward in position to strike the arm 41, and thereby pull down the block 23, which movement lifts the gate 5 through cords 21 and 15. When the gate is fully raised, the spring 46 yields and the point 47 passes below the arm 41 of lever 41 42.

Block 14, connected to the cord of the bottom gate, is provided with a lug, as 48. (See Fig. 7.) hen the car descends below the second floor, the end 47 of lever 44 engages said lug, thereby lifting the bottom gate 4 by means of cord 8. The gate remains open until the car reascends. Similarly the block 30, connected to the cord of the top-floor gate, is provided with a lug, as 49. (See Fig. 6.)

When the top of the car in ascending strikes this lug, it pushes up the block, actuates the cord 25, and lifts the gate, which remains open while the car is at the top floor.

It is obvious that my invention is applicable to buildings of any number of stories.

If the operator on the elevator-car does not wish to raise the gates of the intermediate floors as they are passed, he may hold either lever 37 or 44 in inoperative position, according to whether he is going up or down.

Having now fully described my invention, what I claim as new, and desire to secure by LettersPatent, is

The combinatiomwith an elevator-shaft and a car, of a verticallyslidable gate which is normally in lowered position, a cord connected to the top of the gate and extending upwardly, around suitably-located pulleys, downwardly around a reversing-pulley 19, a slidable block to which said cord is connected, a weighted block 23 having a separate runway, a pulley 22, a cord passing over said pulley and connecting said blocks, bell-crank levers mounted on said blocks, each of said levers being provided with a spring, and two levers carried by the car and adapted to engage the respective bell-crank levers, both for the purpose of automatically opening the gate, in the manner described.

In testimony whereof I affix my signature in the presence of two witnesses.

JAMES H. MORRIS.

Witnesses:

M. L. LANGE, E. W. SHANNON. 

